Clutch control for twisting frames



May 23, 1933. w J, scoTT CLUTCH CONTROL FOR TWISTING FRAMES 2 Sheets-Sheet 1 Filed July 29, 1932 INVENTOR. wife/JO? 0/2 Mm ATTORNEYS.

May 23, 1933. w. J. SCOTT CLUTCH CONTROL FOR TWISTING FRAMES Filed July 29, 1932 2 Sheets-Sheet 2 '1IIIII/III/IIIIIIII/IIIIIIIIfl/IIIIIIIIIIA INVENTOR. rl k/fef .[Jcaf/ A TTORNEYS.

quiringaiaulty twist th us requiring the breakingdownfotthe ends for proper yarn.

1: direction from that Patented May23, 1933 WALTER J. score, or woonsocicnniinonn rsniinn CLUTCH CONTROL FOR TW'ISTING 1 Application fi ledJ'nlj 29, 1932. Serial No. 625,823; 1

iflhis invention relates to an automatic control forthe clutch of a textile machii'ie,\niore partlcularly a twisting machine, and has for one of itsobjects to provide a construction by which the stopping ofthe inachinewill simulate a hand control when the driving motoris suddenly thrownofl. and the operator isunahle to manuallymaninulate the control handle for the proper stoppingof the 1 machine. r 1 1; L13

inother object of the invent on is the pro vision eta [constructionwhich, if the machine is suddenly stopped, the yarn will not 1 1 11 faultily twist, necessitating the breaking and piecing oi' .the ends, and the consequent loss oftime and mperfect yarn n so do ng.

Another object of the invention is the pro vision ofa constri iction whereby the twisting machine maybe more readily started after the machine has been standing and theiparts have become cool without the danger of the machine suddenly vstopping and the yarnac- Ajfurtl'ier object of thei invention is the proyisionof a c-onstructionwhich 1.1 1 3 be attached to the, machines now in use and utilize the niovement of the magnetic pro1-1 tecting sw'itclrfor operating an auxiliary switch to control the stop motion as desired. With these and other objects in View, the intention consists 01 certain novel featuresof construction-as will be more fully described and particularly pointed out in the appended claimsl 1 1 H 1; y 1

In the accompanying drawings 1 fFiJg, 1 is a sectional viewof a po M Fig. 2 is avi ew lookingjatthe frontof the c nStructiOnshoWn in Fig.1 1 with parts removed to illustrate the manner of attachment of the automaticcontrol mechanism which I -1. ;1apnly to twisting fraine.

ingat the end of the to the frame being Viewed in shown Fig. 1.1 1 Fig. 4 is 'asectlon on line 4 of Fig. 3.

rtionoi a1 twistingframe showing in dotted lines-my 1 attachment at one endthereof. 1

Fig. 3 is a; iew largely diagrammatic look twisting frame and show inglny control Inecha ism as applied therethe opposite ig. 5 isan elevation of a fragmental detail looking at the control switch which Imount adjacent the magnetic protecting, switch which is a part of the complete equipmentof thestandardmachine. 1 l 1 1 I Figifi is a section on line 6 -6 of Fig. 5. 1

Fig. Tis a fragmental detailedviewshow ing a 1J0lti01110f the control switch as. shown in, l ig.1 5 with the magnetiocontrol switch 1 and its electromagnetic coil in such position as it will assume relative to that of the con-1 trol sw tch when n operating PQSllllOlL l 1 1 1 Fig. 18 1s a diagrammatic: V18? lllustrating the "electrical connections of tliejioperati'ng partsof the machine.1 M v 11 1 1 l 2 1 In practice in the use of twistingmachines, such for instance asring' twisting, it is cus tomary for the twisting frame tobedriven by an electric motor controlled loya mag netic, swltelr so arranged that when execs-1 sive power is required to-operate the machine themotor may be protected. 1 The magnetic switch .is inserted in the line and set to throw out when too1111great a 1current is passed through the motor, thus stopping the nachine. This condition frequentlyoccurs when the machine is cold and also; when sud-v den or unexpectedstopping occurs such as when the power 1 is. suddenly shut ofl 113mm its source of 1supply-. 1 When a stopping of the machine occurs in such 'a manner, the operator 1S usually unable to manipulate the clutch for controlling the cam shaftas when the power isshut off by theoperat0r inten tionallyh I l 1 1 1 The cam shaftof thetwisterdrives one camfor each spindle and engagesa trip' mechanism to throw the topnroll of thepair of drive rollsfrom its nipping engagement with the lower roll and thus by releasing thisnip O the control of the twist of theyarn is released and faulty twist occurs which, in many cases, must be remedied hybreakage of the yarn re1- 1 quii'ing piecing up the ends. Assuch faulty twistoccurs on every endof yarn along the entire length of the machine, itis common practice'to break all of the ends and pieceul m together again in order that this twist-1 1 11123 1 136 definitely set; or established in the yairn'by taking out the faulty length. This faulty twist occurs, and it is unnecessary to break down the ends and remove any portion of the yarn; and the following is a detailed description of the present embodiment of this-invention illustrating the preferred means by which these advantageous results may be accomplished.

With reference to the drawings, desig- Vnates the frame of the twisting machine,

which is here shown as a ring twister, upon which there is 'rotatably supported a driven roll 11 with which. there engages the upper roll 12 and between which there passes the yarn 13 shown in dot-dash lines The roll 12 is mounted in the bearing notch 14 of the arm 15 which is securedto the rods 1-6, slid-ably supported in the openings 17 of the frame portion 18 of the machine. A'bearing 19 is fixed to the arm 15 and in this bearing there is'pivoted a feeler member20 having a finger 21 with which the yarn 13 engagesin its travel from the supply to the traveler on the ring to maintain the arm in the position illustrated in Fig. 1. This feeler arm member 20 is provided with a weighted portion 22 on the other side of its pivot and should the yarn break or become slack this feeler member will then swing, allowing the rear portion 23'. of the member to drop into engagement with'the cam 24 having abutment surfaces 25 to engage this portion 23 and slide the rod 16 together with the arm 15 and the roll 12 forward to position-the roll 12 as shown in dotted lines out 'of nipping engagement with the bottom roller 11'.

The cam 24 is driven by the gear 26 on the cam shaft 27 through gears 28 and 2-9, the latter of which engages with thegear 30 on the lower roll shaft 31. v k

v The pivoted pawl 32 engages the-block 33 secured to the rods 16 and is held in such engagement by the weight 34 to maintain the carnage for the upper roll in the position to which it is shifted.

The shaft 31 is driven by a pulley 35 and belt from a suitable source of power, such as an electric motor. The drive of the roll is controlled through a clutch comprising the parts 36 and 3,7, the latter of which is attached to a member 38 shiftable axially along the shaft 31 for engagement or disaga-g ent of the clutchparts for the driving of the roll and the gears driven from the shaft 31. This clutch is shifted by a handle 39 through suitable arm 40 and push rod 41. In operation it is usual for the operator to keepthe clutch disengaged until the motor and machine are sufficiently warmed up in order to avoid the overload, due to the cold machine when first starting, and then when the clutch is engaged to watch the'operation to see whether any such overload does occur as will throw out the magnetic protecting switch for the motor, and in such event withdraw the clutch through the handle 39 in order to prevent the throwing forward of each of the upper rolls and consequent release of the nip, untwisting of the yarn and necessity of breaking down the ends and piecing up the yarn.

\Vhen the operator desires to stop the machine, the drive for the cam is first thrown out before the motor is stopped in order to avoid the throwing off of the top roll. It so happens,'however, that sometimes overloads occur, such as where the lines are damaged by an electrical storm or the power may be suddenly shut off at its source of supply and the machine will suddenly stop before the operator has an opportunity to withdraw the clutch'by handle 39, and when such a condition occurs each of the top rolls are thrown forward and the nip is lost on the yarn and this v necessitates the breaking by hand of each of the parts of twisted yarn and piecing them together again which takes considerable time where a large number of spindles are being operated such as in twisters of this character.

The above description relates to the known form of twisting machine, and in order that this undesirable result may be'eliminated, I mount a shaft 42 on one end 43 of the twister frame supporting the same suitably in bearings 44 for rotation therein, An arm secured to said shaft 42 is provided with a bifurcated yoke 45 which will engage the recess 46, in the collar 39a secured to the push rod 41. A springv 47 tends to rotate the shaft 42 in such a way as to move the collar 39a to pull the clutch out of engagement. This spring is fastened at one end 48 to thc bearing and at its other end 49 to the nut 50 which may be rotated onthe shaft 42 to adjust the tension thereof, in which desired position of adjustment it is held by the set screw 51. p c

When the clutch parts areengaged and the spring is undertension, I resist the tendency of the spring topull the clutchout of engagement by the arm 52 secured to the rod 42 and link 53 pivoted at the end thereof and extend ing downwardly therefrom to rest upon a trigger 54 which is held in a position to support the link 53 by reason of spring 55. This trigger mechanism is more fully shown in my co-pending application Serial No. 386,173,

magnetic switch in the said circuit when at 69, whereby upon energizing the coil 57 the trolled through an armature 56 and electroprotectingthe electric motor in case of an magnet 57 which is placed in circuit with a control switch 58 having contacts 59 and 60 so positioned as to be engaged and closed by the portion 61 of the armature 637which are part of the magnetic protecting switch in the circuit-of an automatic starter with an overload relay mounted on one end of the machine as the usual equipment thcreoffor overload.

Referring to Fig. 7 the numeral 62 desigmature being shaped to provide an extension 61 adapted to swing into the central opening provided in the coil 62.

When an overload occurs in the circuit of a the starter the coil 62 is deenergized and the armature 63 swings away from the coil and operates to shut off the currentlto the motor.

The switch 58 of my device is positioned to be 25 engagedby this armature 63 when disengagedfrom the coil 62.

Referring to Fig. 8 the general arrangement of the parts will be understood and con sidering that the framework of the machine is a ground or one side of the electrical conl nection it may be explained that theshaft31 X is driven through pulley from a suitable electric motor 65 by means of belt 66 and that this motor is in the circuit of the autoinatlc. starter and is protected by the electroan overload occurs the armature 63 swings away from the 0011 and'into engagement with my switch 58 which closes contacts 59 and 60 to close the circuitof my devicewhich may be traced through wire 67 to the arm 53 and thence through this arm or ground to the electromagnet 57 and from the other end of the electromagnet through the lead 68 to the source of power indicated diagrammatically trigger. 54 is tripped, allowing the link 53 to fall and the spring 47 to rotate the rod 41.2 and withdraw the clutch from engagement.

lVhen the link 53 falls its cam surface swingsit out of engagementwith the trigger and in this way breaks the electrical circuit which passes through it.

thus eliminating the necessity of breaking down theyarn and then piecing it up again I upon the accidental stopping of the machine- I have shownand described this invention asapplied to a twisting frame having a clutch for controlling the cam shaft. However, it will be understood that I may utilize the same or a similar construction and arrangement in connection with other twisting desire itto be understood that'I reserve the privilege of resorting to the mechanical changes to which the device is susceptible, the invention being defined and limited only by the termsof the appended claims.

1. A" stop motion for atwisting frame having a clutch controland a magnetic protecting switch comprising means responsive to themovement of saidprotecting switch to'wit'hdraw said clutch from operating engagement; Y H 2. Incombination, a twisting frame having a cam shaft, an electric drive motor, a magnetic protecting switch and a clutch control for the camshaft, of means to operate said clutch. in response to themovement of said magnetic protecting switch.

3. A stop motion for a twisting frame having a clutch control and a magnetic protecting switch, comprising a shaft, means tending to rotate said shaftin one direction, means for connecting said shaft to said means for resisting the said rotating move ment of said shaft and means responsive to protecting switch to rea clutch to move the clutch out of engagement,

for resisting the said rotatingmovement of said shaft, and electromagnetic means responsive to the movement of said protecting switch to remove said resistance.

5. A stop motion for a twisting frame having a clutch control and a magnetic protecting switch, comprising a shaft, means tending to rotate said shaft in one. direction, meansfor connecting said shaftto said clutch to move the clutch out of engagement, 2. trigger, means connecting said trigger to said shaft to resist said turning when the clutch is in engaged position and means responsive tothe movement of said protecting switch to. withdraw said trigger and permit said shaft to turn and withdraw said clutch.

q 6. A stop motion for a twisting frame having a clutch control anda magnetic protecting switch, comprising a shaft, means tending to rotate said shaft in one direction, means for connecting said shaft to said clutch to move the clutch'out ofengagement, electromagnetic means for operating said trigger, the last said means being positioned to for connecting said shaft to said clutch to i move the clutch out of engagement, a trigger be operable upon operation of the protecting switch for stopping the motor.

7 In combinatioma twisting frame having mechanism for altering the nipping re lation of the rolls upon stopping of the machine, means to control said mechanism, and a magnetic protecting switch, of means to operate said control means in response to the movement of said magnetic protecting switch 1 9 to prevent the altering of the nipping relation of said rolls. s

' 8. A stop motion for a twisting frame having mechanism for altering thewnipping relation of the'rolls upon stopping of the ma-- -1. chine and means to control saidmechanism, a shaft, means tending to rotate 'saidshaft in one direction, means connecting said shaft tosaid control means, means for resisting the rotation of said shaft and means responsive to the movement'of said protecting switch to remove said resistance. 7 I l In testimony whereof I affix my signature.

WALTER J. SCOTT. 

